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Replica man
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2,175 Posts
Discussion Starter #1
Bit of a random question but induction cones come in all different sizes, now would I be foolish to think that a bigger cone means more noise?

Could a bigger cone increase performance as there's more surface area so potential to get more air if needed?

Does the sound even come from the suction in the cone or from the throttle body?

Lots of questions I know cheers for anything you can provide at all.
 

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Registered
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2,014 Posts
Potetially yes to all the above, however the temperature of the air will be much greater therefore resulting in less power to the engine, so its a bit of a compromsie really.

Also your AFM will wear out quicker due to hot air and oils bombarding it.

I used to have one but disregarded it after THREE AFM's gave out on my previous car.
 

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Replica man
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2,175 Posts
Discussion Starter #3 (Edited)
well im thinking of getting a enclosed induction kit to replace the cone part of my 57i and they come in all sizes so i was thinking about getting the biggest but its costs more and i wouldnt mind little bit more noise
 

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Cockup Specialist
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12,885 Posts
A bigger space will be more basey I guess... soundwise.
You want the largest enclosed cone volume as possible (but enclosing it will kill the sound).
The air has to accelerate and if it can get that instant need locally rather than a long tube to outside the car, throttle response is better.

The noise comes from the induction pulse which is actually in both directions... but is biased towards the engine.
Stopping the out pulse and aiding the inward pulse is one of the methods to enhance power (pulse traps).

Most enclosed cone design are really really lousy though and create turbulence which reduces airflow.
The BMC CDA is one exception that has had some thought put to it.
The is a junior version also without the carbon fibre and similar design (much cheaper).

The idea of filter oils is they make the fibres tacky and hold dirt to the filter.
The oils are not meant to detach from the filter although they will if over oiled or gas speeds are high enough.
Even then the coat on the MAF can be cleaned off ;)
 
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